Class: LogStash::Codecs::Prometheus

Inherits:
Base
  • Object
show all
Defined in:
lib/logstash/codecs/prometheus.rb

Instance Method Summary collapse

Instance Method Details

#decode(data) ⇒ Object 



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# File 'lib/logstash/codecs/prometheus.rb', line 18

def decode(data)
  events = []
  @lines.decode(data) do |event|
    unless event.get("message").start_with?("#")
      metric_name, metric_value = event.get("message").split(" ")
      unless metric_name.match(/^.+{.+}$/)
        events << {metric_name => metric_value.to_f}
      else
        outside, inside = metric_name.match(/^(.+){(.+)}$/).captures
        vars = inside.split(",")
        labels = {}
        keys = []
        vars.each do |var|
          key, value = var.split("=")
          keys << key.downcase
          labels[key.downcase] = value.gsub!(/^\"|\"?$/, "")
        end
        custom_metric_name = keys.unshift(outside.downcase).join('_')
        events << {custom_metric_name => {outside.downcase => metric_value.to_f, "labels" => labels}}
      end
    end
  end
  unless events.empty?
    if @multi_event
      events.each do |event|
        yield LogStash::Event.new(event)
      end
    else
      hash = {}
      events.each do |event|
        event.to_h.each do |metric_name, metric_value|
          hash[metric_name] = metric_value
        end
      end
      yield LogStash::Event.new(hash)
    end
  end
end

#encode(event) ⇒ Object 



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# File 'lib/logstash/codecs/prometheus.rb', line 58

def encode(event)
  @on_event.call(event, event.to_json)
end

#register ⇒ Object 



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# File 'lib/logstash/codecs/prometheus.rb', line 13

def register
  @lines = LogStash::Codecs::Line.new
end